Indoswiss Electricals & Enterprises

Single core cables in operation carry alternating currents and induced voltages in the metallic sheath of the cable. These currents may cause, depending from the sheath bonding, circulating currents flowing in the cable sheath which reduce the transmission capacity of the cable and cause an additional heating. Link Boxes are used for earthing and bonding cable sheaths of single core cables so that the induced voltages and circulating currents are eliminated or reduced.


Advanced Features

•Different designs available
•Stainless steel box
•Different mechanical protection levels up to IP68
•Electrically and mechanically type tested
•1-phase and 3-phase boxes
•With or without surge arresters
•With or without removable links
•For concentric cables or single core cables
•Cross sections up to 300 mm2
•ZnO sheath voltage limiter for up to 7kV protection levels, larger protection levels on request
•Short circuit current up to 40 kA 1 sec


Major Design Elements


TE Connectivity's Raychem link boxes have reliable design and the housing

(1) is made of stainless steel. The enclosure is water and dust tight type tested to fulfil the requirements of protection class IP68 for installations below ground. For other applications e.g. indoor installation, link boxes with less protection class are also available. Designs are capable to withstandings different electrical demands for several voltage classes. The link box lid is lockable

(2) by a standard security deadlock. The optional sheath voltage limiters (SVL)

(3) are made of zinc oxide and are designed to meet the requirements of IEC 60099-4. Link boxes with SVL’s are available for different voltage classes and provide active over-voltage protection that contributes directly to improved reliability of the system. The indoor post-insulators

(4) made of epoxy resin are light weight and provide reliable electrical performance. The cable entries

(5) are available with different inner diameters to fit single core or concentric cables with different cross sections. For perfect sealing cable entries are protected with coated heat shrink tubes

(6). Sheath bonding cables are fixed by various methods with compression lugs

(7) or by using clamping rings. The tinned copper links

(8) are removable and available for cross sections up to 300 mm2.

Additional Information:

• Production Capacity: 100000
• Delivery Time: Ready stock
• Packaging Details: Ctn